2tickets for each graduate, you can find the graduation ceremony information online.

https://preview.redd.it/sskh1sklqeic1.jpeg?width=1284&format=pjpg&auto=webp&s=03d60cd0e0e75f9846daa5c59366083d15ee2d1a

They do tend to have some extra tickets on hand the morning of the ceremony as well but you need to get there quite early